Flask requests用session模拟登录

from requests import get,post,Session

@app.route('/access_admin_url',methods=['POST'])
def access_admin_url():
    dict = request.form
    login_url = dict.get('login_url')
    site_user = dict.get('site_user')
    site_pass = dict.get('site_pass')
    access_url = dict.get('access_url')
    payload = {'username':site_user,'password':site_pass}
    headers = {'user-agent': 'my-test/auto_login'}
    S = Session()
    R_1 = S.get(login_url,headers=headers)
    R_2 = S.post(login_url,headers=headers,data=payload)
    R_3 = S.get(access_url,headers=headers)